Door-bolt



E. J. SMITH.

DOORBOLT'.

APPLICATION FILED SEPT. 4,1919.

1,345,031 Patented June 29, 1920.

EDWIN JOSEPH SMITH, or LONDON, ENGLAND.

DOOR-BOLT.

Specification of Letters Patent.

Patented June 29, 1920.

Application filed September 4, 1919. Serial No. 321,676.

To all whom it may concern:

Be it known that I, EDWIN JOSEPH SMITH,

a subject of the King of England, residing at London, England, have invented certain Improvements in Door-Bolts, of which the following is a specification.

The present invention relates to a door bolt for use with double-doors instead of the customary flush or surface bolt, and consists in the provision in a lock casing of two spring-supported bolts set at right .angles and coupled together by a bell-crank lever, one bolt having. a rounded end projecting normally but slightly from the casing,the

other bolt being beveled and also projecting normally from the casing. The arran ement .is such that the rounded bolt, WhlCh normally only projects enough to retain the door in shut position, is shot when the beveled bolt is forced back into the casing by the shutting of the lock door. Y

In the accompanying drawing the invention is illustrated by a perspective view of the mechanism. 7

In a lock casing a are arranged two bolts b and c at right angles to each other. These bolts are coupled together by a bell-crank lever 03 turning about a pivot and causing one bolt to'be shot when the other one is retracted. The bolt 0 has a beveledend and is normally retained by a spring'e in a projecting position. Another spring f, weaker than the spring 6, supports the bolt 1). which has a rounded end projecting normally only to the extent of the rounded portion from the casing a.

The casing is fitted in the edge of the door with the bolt 1) directed toward the door frame, which has a mortise for its reception, and projects only just enough to retain the door 1n shut position, yielding so that the door can be easily opened and shut. The bolt 0 is directed toward the door fitted with the look. When the latter pose set forth.

door is shut, it strikes against the bolt 0 and forces it back into the casing a, the result being to shoot the bolt 6 completely. The doors are thus fixed and locked by one sinlgle operation.

I he bolt 0 is preferably made reversible so that the same structure can be used either for the door.

upper or lower corner of the p The bolt is suitable for all 11 ht doubledoors employed in furniture, de ivery vans and the like.

I claim 1. A door bolt comprising a casing, two

spring-supported bolts arranged at right angles in said casing, one bolt having a rounded end,'the rounded portion proj ecting i normally from the casing, the other bolt be-.

ing beveled, the beveled portion projecting normally from the casing, and a bell-crank lever arranged in the casing and engaging the two bolts so as to cause the round-ended bolt to be shot completely when the beveled bolt is forced into the casing, substantially as and'for the purpose set forth.

2. -A door bolt comprising a casing, two

spring-supported bolts arranged at right angles in said casing, one bolt having a rounded end, the roundedpo'rtion projectting normally fromthe casing, the other bolt being beveled, the beveled portion pro'ecting normally from the casing, and a ellcrank lever arranged in the casing and engaging the two bolts so as to cause the v round-ended bolt to be shot completely when thebeveled bolt is forced into the casing, the beveled bolt being reversible so that the bevel can be turned to either side of the case, substantially as and for the pur- EDWIN JOSEPH SMITH.

Witnesses:

AUG. DANIELSSON, j JonN HANS. 

